An acethion synthesis processing device and synthesis process

Abstract

This invention relates to the field of acephate synthesis and processing technology, specifically to an acephate synthesis and processing equipment and process, including a reaction vessel body. A servo motor is fixedly installed on the top of the reaction vessel body. A feed pipe and a pressure relief valve are provided on the reaction vessel body. A heat-conducting coil is fitted on the outer surface of the reaction vessel body. A manhole and a flange pipe are provided on the reaction vessel body. Before the rupture disc explodes, it will be pressured upwards. Under the action of the stud, it will drive the first driving component to rise, causing the first driving component to drive one end of the pressure rod, causing one end of the pressure rod to tilt upwards. The other end drives the fastening component to move downwards, thereby fastening the fastening component and improving the sealing performance when the pressure inside the reaction vessel body is at its maximum. At the same time, the second driving component will also move upwards, driving the driven component, causing the power rod to drive the locking head to move in the locking direction, thereby causing the locking head and the locking buckle to engage together, achieving an explosion-proof effect.

Description

Technical Field

[0001] This invention relates to the field of acephate synthesis and processing technology, specifically to an acephate synthesis and processing equipment and synthesis process. Background Technology

[0002] Acephate is a highly effective, low-toxicity, and low-residue broad-spectrum organophosphorus insecticide that is widely used in agricultural production to control chewing and piercing-sucking pests and mites on various crops such as cotton, rice, and wheat. Currently, the main methods for synthesizing acephate include isomerization followed by acylation, acylation followed by isomerization, and synthesis through multiple steps using phosphorus oxychloride as a raw material.

[0003] Acylation reactions often use reactive reagents such as acid anhydrides and acyl chlorides, which are flammable and explosive, and the reactions are highly exothermic. Existing explosion-proof reactors mostly use safety valve pressure relief structures, but they can only passively relieve pressure in the instant of overpressure, making it difficult to control the reaction environment inside the reactor from the root. In addition, the sealing structure of traditional reactors is prone to aging and failure under high temperature and high pressure environments, further increasing safety hazards. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an acephate synthesis and processing equipment and process, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an acetamiprid synthesis and processing device, comprising a reaction vessel body, a servo motor fixedly installed on the top of the reaction vessel body, a material pipe and a pressure relief valve provided on the reaction vessel body, a heat-conducting coil sleeved on the outer surface of the reaction vessel body, a manhole and a flange pipe provided on the reaction vessel body, and bolts provided on the manhole and flange pipe, with nuts threaded to both the upper and lower sides of the outer surface of the bolts for fixing the manhole and flange pipe, and an external thread provided on the upper side of the outer surface of the flange pipe, with a connecting pipe threaded to the external thread.

[0006] Preferably, a connecting rib is fixedly installed in the inner cavity of the connecting pipe, a rupture disc is provided on the connecting rib, a stud is movably installed on the rupture disc, and a first limiting block is fixedly installed on the top of the rupture disc, with the first limiting block positioned above the rupture disc.

[0007] Preferably, it also includes a sealing assembly, which includes a sealing module and a reinforcement module. The sealing module includes components disposed at the connection between the connecting pipe and the flange pipe for sealing the connection gap between the flange pipe and the connecting pipe.

[0008] Preferably, the reinforcement module includes a first guide post fixedly installed at the bottom of the connecting rib, a second limiting block fixedly installed at the bottom of the first guide post, a first driving member movably installed on the outer surface of the first guide post, a plurality of mounting members fixedly installed on the inner wall of the connecting tube, a pressure rod movably installed on the mounting member, and a fastening member fixedly installed at the end of the pressure rod away from the first driving member, with the fastening member positioned at the top.

[0009] Preferably, it also includes an explosion-proof component, which includes a collection module and an explosion-proof module. The collection module includes an air mesh plate fixedly installed in the manhole cavity. A second guide post is fixedly installed on the upper surface of the air mesh plate. A third limiting block is fixedly installed on the top of the second guide post. A second driving component is movably installed on the outer surface of the second guide post.

[0010] Preferably, the explosion-proof module includes a driven member disposed above the second driving member, and a power rod fixedly connected to the driven member. A lock head is fixedly installed at the other end of the power rod, and a latch adapted to the lock head is fixedly installed on the manhole.

[0011] Preferably, a limit frame is fixedly installed on the second driving member, the lock head is movably installed in the inner cavity of the limit frame, a return spring is fixedly connected to the surface of the lock head, and the other end of the return spring is fixedly connected to the inner wall of the manhole cavity.

[0012] Preferably, the stud passes through the first driving member and the second driving member, and the contact portion between the stud and the first and second driving members is provided with threads for fixing the first and second driving members.

[0013] Preferably, a recovery pipe is fixedly connected to the connecting pipe, and an emergency pressure relief tank is fixedly connected to the other end of the recovery pipe.

[0014] A process for synthesizing acephate, using the aforementioned acephate synthesis and processing equipment, includes the following steps:

[0015] S1: A pressure transmitter and pipeline can be installed on the pressure relief valve to connect the pipeline to the emergency pressure relief tank. The opening pressure of the pressure relief valve can be set to . times the rated working pressure of the reactor body. When the pressure inside the reactor body exceeds the threshold, the pressure relief valve automatically opens, and the excess gas is discharged into the emergency pressure relief tank through the pipeline for pressure relief. The burst pressure of the rupture disc is set to . times the opening pressure of the pressure relief valve. When the pressure relief valve fails or the pressure increases suddenly, the rupture disc ruptures, and the high-pressure gas enters the emergency pressure relief tank through the recovery pipeline. Buffer packing and cooling spray devices can be installed in the emergency pressure relief tank to reduce and cool the gas, prevent direct discharge from causing danger, and avoid the problem of sudden pressure increase in the pressure relief valve during the acylation reaction.

[0016] S2: Before the rupture disc explodes, it will be pressured and move upward. Under the action of the stud, it will drive the first driving component to rise, so that the first driving component drives one end of the pressure rod, causing one end of the pressure rod to tilt upward. The other end drives the fastening component to move downward, thereby making the fastening component fasten, thus improving the sealing performance when the pressure inside the reactor is at its maximum and preventing gas leakage.

[0017] S3: When the rupture disc moves upward, the stud will drive the second driving component to move upward. When the second driving component moves upward, it will drive the driven component, causing the power rod to drive the lock head to move in the locking direction, thereby making the lock head and the lock latch together to achieve the explosion-proof effect. When the rupture disc explodes, there will be fragments. These fragments can be collected by the gas mesh plate to prevent them from entering the reactor and causing pollution to the synthesis of acephate.

[0018] In the above technical solution, the beneficial effects of the present invention are as follows: before the rupture disc explodes, it will be subjected to pressure and move upward. Under the action of the stud, it will drive the first driving member to rise, so that the first driving member drives one end of the pressure rod, causing one end of the pressure rod to tilt upward, and the other end drives the fastening member to move downward, thereby fastening the fastening member, thereby improving the sealing performance when the pressure inside the reactor is at its maximum. At the same time, the second driving member will also move upward, driving the driven member, so that the power rod drives the locking head to move in the locking direction, thereby making the locking head and the locking buckle interlock together, achieving the explosion-proof effect.

[0019] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0020] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram showing the positional relationship between the sealing component and the explosion-proof component of the present invention. Figure 1 ;

[0023] Figure 3 This is a schematic diagram showing the positional relationship between the sealing component and the explosion-proof component of the present invention. Figure 2 ;

[0024] Figure 4 This is a schematic diagram showing the positional relationship between the sealing component and the explosion-proof component of the present invention. Figure 3 ;

[0025] Figure 5 For the present invention Figure 4A magnified schematic diagram of the local structure at point A;

[0026] Figure 6 For the present invention Figure 3 A magnified schematic diagram of the local structure at point B;

[0027] Figure 7 For the present invention Figure 3 A magnified schematic diagram of the local structure at point C;

[0028] Figure 8 For the present invention Figure 4 A magnified schematic diagram of the structure at point D.

[0029] In the diagram: 1. Reactor body; 11. Servo motor; 12. Feed pipe; 13. Heat transfer coil; 14. Pressure relief valve; 15. Manhole; 16. Flange pipe; 17. Bolt; 18. Nut; 19. Connecting pipe; 2. Connecting rib; 21. Rupture disc; 22. Stud; 23. First limiting block; 3. First guide post; 31. Second limiting block; 32. First driving component; 33. Mounting component; 34. Pressure rod; 35. Fastening component; 4. Gas mesh plate; 41. Second guide post; 42. Third limiting block; 43. Second driving component; 44. Driven component; 45. Power rod; 46. Lock head; 47. Locking buckle; 5. Limiting frame; 51. Return spring; 6. Recovery pipe; 61. Emergency pressure relief tank. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0031] Example 1: Please refer to Figures 1 to 5 The present invention provides a technical solution: an acetamiprid synthesis and processing equipment, including a reaction vessel body 1, a servo motor 11 fixedly installed on the top of the reaction vessel body 1, a material pipe 12 and a pressure relief valve 14 provided on the reaction vessel body 1, a heat conduction coil 13 sleeved on the outer surface of the reaction vessel body 1, a manhole 15 and a flange pipe 16 provided on the reaction vessel body 1, and bolts 17 provided on the manhole 15 and the flange pipe 16, nuts 18 threaded on both the upper and lower sides of the outer surface of the bolts 17 for fixing the manhole 15 and the flange pipe 16, and an external thread on the upper side of the outer surface of the flange pipe 16, with a connecting pipe 19 threaded on the external thread.

[0032] A connecting rib 2 is fixedly installed in the inner cavity of the connecting pipe 19. A rupture disc 21 is provided on the connecting rib 2. A stud 22 is movably installed on the rupture disc 21. A first limiting block 23 is fixedly installed on the top of the rupture disc 21, and the first limiting block 23 is located above the rupture disc 21.

[0033] It also includes a sealing assembly, which includes a sealing module and a reinforcement module. The sealing module includes 36 disposed at the connection between the connecting pipe 19 and the flange pipe 16, for sealing the connection gap between the flange pipe 16 and the connecting pipe 19.

[0034] The stud 22 passes through the first driving member 32 and the second driving member 43. The stud 22 has threads at the contact points with the first driving member 32 and the second driving member 43 to fix the first driving member 32 and the second driving member 43.

[0035] A recovery pipe 6 is fixedly connected to the connecting pipe 19, and an emergency pressure relief tank 61 is fixedly connected to the other end of the recovery pipe 6.

[0036] Specifically, the synthesis methods of acephate mainly include isomerization followed by acylation, acylation followed by isomerization, and multi-step synthesis using phosphorus oxychloride as a raw material. Among these, the acylation reaction often uses reactive reagents such as acid anhydrides and acyl chlorides, which are flammable and explosive, and the reaction is highly exothermic. Existing explosion-proof reactors mostly adopt a safety valve pressure relief structure, but it can only passively relieve pressure in the instant of overpressure, making it difficult to fundamentally control the reaction environment inside the reactor. In this invention, a pressure transmitter and pipeline can be installed on the pressure relief valve 14, so that the pipeline is connected to the emergency pressure relief tank 61. The opening pressure of the pressure relief valve 14 can be set to 1.1 times the rated working pressure of the reactor body 1. When the pressure inside the reactor body 1 exceeds the threshold, the pressure relief valve 14 automatically opens to release the excess gas. The gas is discharged into the emergency pressure relief tank 61 through a pipeline for pressure relief. The burst pressure of the rupture disc 21 is set to 1.2 times the opening pressure of the pressure relief valve 14. When the pressure relief valve 14 fails or the pressure increases suddenly, the rupture disc 21 ruptures, and the high-pressure gas enters the emergency pressure relief tank 61 through the recovery pipeline 6. Buffer packing and cooling spray devices can be installed in the emergency pressure relief tank 61 to reduce and cool the gas, prevent direct discharge from causing danger, and avoid the problem of sudden pressure increase in the pressure relief valve 14 during the acylation reaction. In addition, refrigerant can be introduced into the heat conduction coil 13 to remove heat through refrigerant circulation. Temperature sensors are installed to monitor the internal temperature of the reactor body 1 in real time and feed it back to the control system to achieve closed-loop temperature control and further ensure the safety of the acylation process.

[0037] Furthermore, before the rupture disc 21 detonates, it will be subjected to pressure and move upward. Under the action of the stud 22, it will drive the first driving member 32 to rise, so that the first driving member 32 drives one end of the pressure rod 34, causing one end of the pressure rod 34 to tilt upward, and the other end to drive the fastening member 35 to move downward, thereby fastening the fastening member 35 to 36, thereby improving the sealing performance when the pressure inside the reactor body 1 is at its maximum and preventing gas leakage.

[0038] Example 2: Please refer to Figures 6 to 8The reinforcement module includes a first guide post 3 fixedly installed at the bottom of the connecting rib 2, a second limiting block 31 fixedly installed at the bottom of the first guide post 3, a first driving component 32 movably installed on the outer surface of the first guide post 3, several mounting components 33 fixedly installed on the inner wall of the connecting pipe 19, a pressure rod 34 movably installed on the mounting component 33, and a fastening component 35 fixedly installed at the end of the pressure rod 34 away from the first driving component 32, with the fastening component 35 located above 36.

[0039] It also includes an explosion-proof component, which includes a collection module and an explosion-proof module. The collection module includes an air mesh plate 4 fixedly installed in the inner cavity of the manhole 15. A second guide post 41 is fixedly installed on the upper surface of the air mesh plate 4. A third limiting block 42 is fixedly installed on the top of the second guide post 41. A second driving component 43 is movably installed on the outer surface of the second guide post 41.

[0040] The explosion-proof module includes a driven member 44 disposed above the second driving member 43, and a power rod 45 fixedly connected to the driven member 44. A lock head 46 is fixedly installed at the other end of the power rod 45, and a latch 47 adapted to the lock head 46 is fixedly installed on the manhole 15.

[0041] The second driving component 43 is fixedly installed with a limit frame 5, and the lock head 46 is movably installed in the inner cavity of the limit frame 5. A return spring 51 is fixedly connected to the surface of the lock head 46, and the other end of the return spring 51 is fixedly connected to the inner wall of the manhole 15.

[0042] Based on Example 1, when the rupture disc 21 moves upward, the stud 22 will drive the second driving member 43 to move upward. The driven member 44 is wedge-shaped. When the second driving member 43 moves upward, it will drive the driven member 44, causing the power rod 45 to drive the locking head 46 to move towards the latch 47. Then, the locking head 46 and the latch 47 are engaged together, improving the connection strength between the manhole 15 and the flange pipe 16 and achieving an explosion-proof effect. The limiting frame 5 can guide and limit the power rod 45 to drive it stably. The return spring 51 is used to reset the locking head 46. Furthermore, when the rupture disc 21 explodes, there will be fragments. These fragments can be collected by the gas mesh plate 4 to prevent them from entering the reactor body 1 and causing pollution to the synthesis of acephate.

[0043] A process for synthesizing acephate, using the aforementioned acephate synthesis and processing equipment, includes the following steps:

[0044] S1: A pressure transmitter and pipeline can be installed on the pressure relief valve 14 to connect the pipeline to the emergency pressure relief tank 61. The opening pressure of the pressure relief valve 14 can be set to 1.1 times the rated working pressure of the reactor body 1. When the pressure inside the reactor body 1 exceeds the threshold, the pressure relief valve 14 will automatically open to discharge excess gas into the emergency pressure relief tank 61 for pressure relief. The burst pressure of the rupture disc 21 can be set to 1.2 times the opening pressure of the pressure relief valve 14. When the pressure relief valve 14 fails or the pressure increases suddenly, the rupture disc 21 will rupture, and the high-pressure gas will enter the emergency pressure relief tank 61 through the recovery pipeline 6. Buffer packing and cooling spray devices can be installed in the emergency pressure relief tank 61 to reduce and cool the gas, prevent direct discharge from causing danger, and avoid the problem of sudden pressure increase in the pressure relief valve 14 during the acylation reaction.

[0045] S2: Before the rupture disc 21 explodes, it will be subjected to pressure and move upward. Under the action of the stud 22, it will drive the first driving member 32 to rise, so that the first driving member 32 drives one end of the pressure rod 34, causing one end of the pressure rod 34 to tilt upward, and the other end drives the fastening member 35 to move downward, thereby fastening the fastening member 35 to fasten 36, thereby improving the sealing performance when the pressure inside the reactor body 1 is at its maximum and preventing gas leakage;

[0046] S3: When the rupture disc 21 moves upward, the second driving component 43 will move upward under the action of the stud 22. When the second driving component 43 moves upward, it will drive the driven component 44, so that the power rod 45 drives the locking head 46 to move towards the locking buckle 47, and then the locking head 46 and the locking buckle 47 are engaged together to achieve the explosion-proof effect. When the rupture disc 21 explodes, there will be fragments. These fragments can be collected by the gas mesh plate 4 to prevent the fragments from entering the reactor body 1 and causing pollution to the synthesis of acephate.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A processing apparatus for the synthesis of acephate, comprising a reaction vessel (1), characterized in that: A servo motor (11) is fixedly installed on the top of the reactor body (1). A material pipe (12) and a pressure relief valve (14) are provided on the reactor body (1). A heat-conducting coil (13) is fitted on the outer surface of the reactor body (1). A manhole (15) and a flange pipe (16) are provided on the reactor body (1). Bolts (17) are provided on the manhole (15) and the flange pipe (16). Nuts (18) are threaded on both the upper and lower sides of the outer surface of the bolts (17) for fixing the manhole (15) and the flange pipe (16). An external thread is provided on the upper side of the outer surface of the flange pipe (16). A connecting pipe (19) is threaded on the external thread.

2. The acetamiprid synthesis and processing equipment according to claim 1, characterized in that: A connecting rib (2) is fixedly installed in the inner cavity of the connecting pipe (19). A rupture disc (21) is provided on the connecting rib (2). A stud (22) is movably installed on the rupture disc (21). A first limiting block (23) is fixedly installed on the top of the rupture disc (21), and the first limiting block (23) is located above the rupture disc (21).

3. The acetamiprid synthesis and processing equipment according to claim 2, characterized in that: It also includes a sealing assembly, which includes a sealing module and a reinforcement module. The sealing module includes (36) disposed at the connection between the connecting pipe (19) and the flange pipe (16) for sealing the connection gap between the flange pipe (16) and the connecting pipe (19).

4. The acetamiprid synthesis and processing equipment according to claim 3, characterized in that: The reinforcement module includes a first guide post (3) fixedly installed at the bottom of the connecting rib (2), a second limiting block (31) fixedly installed at the bottom of the first guide post (3), a first driving member (32) movably installed on the outer surface of the first guide post (3), a plurality of mounting members (33) fixedly installed on the inner wall of the connecting pipe (19), a pressure rod (34) movably installed on the mounting member (33), a fastening member (35) fixedly installed at the end of the pressure rod (34) away from the first driving member (32), and the fastening member (35) is located above (36).

5. The acephate synthesis and processing equipment according to claim 4, characterized in that: It also includes an explosion-proof component, which includes a collection module and an explosion-proof module. The collection module includes an air mesh plate (4) fixedly installed in the inner cavity of the manhole (15). A second guide post (41) is fixedly installed on the upper surface of the air mesh plate (4). A third limiting block (42) is fixedly installed on the top of the second guide post (41). A second driving member (43) is movably installed on the outer surface of the second guide post (41).

6. The acephate synthesis and processing equipment according to claim 5, characterized in that: The explosion-proof module includes a driven member (44) disposed above the second driving member (43) and a power rod (45) fixedly connected to the driven member (44). A lock head (46) is fixedly installed at the other end of the power rod (45), and a latch (47) adapted to the lock head (46) is fixedly installed on the manhole (15).

7. The acetamiprid synthesis and processing equipment according to claim 6, characterized in that: A limiting frame (5) is fixedly installed on the second driving member (43), and the lock head (46) is movably installed in the inner cavity of the limiting frame (5). A reset spring (51) is fixedly connected to the surface of the lock head (46), and the other end of the reset spring (51) is fixedly connected to the inner wall of the manhole (15).

8. The acetamiprid synthesis and processing equipment according to claim 5, characterized in that: The stud (22) passes through the first driving member (32) and the second driving member (43). The stud (22) has threads at the contact points with the first driving member (32) and the second driving member (43) for fixing the first driving member (32) and the second driving member (43).

9. The acetamiprid synthesis and processing equipment according to claim 1, characterized in that: A recovery pipe (6) is fixedly connected to the connecting pipe (19), and an emergency pressure relief tank (61) is fixedly connected to the other end of the recovery pipe (6).

10. A process for synthesizing acephate, using any one of the acephate synthesis and processing equipment according to claims 1-9, characterized in that, Includes the following steps: S1: A pressure transmitter and pipeline can be installed on the pressure relief valve (14) so ​​that the pipeline is connected to the emergency pressure relief tank (61). The opening pressure of the pressure relief valve (14) can be set to 1.1 times the rated working pressure of the reactor body (1). When the pressure in the reactor body (1) exceeds the threshold, the pressure relief valve (14) will open automatically and discharge the excess gas into the emergency pressure relief tank (61) through the pipeline for pressure relief. The burst pressure of the rupture disc (21) is set to 1.2 times the opening pressure of the pressure relief valve (14). When the pressure relief valve (14) fails or the pressure increases suddenly, the rupture disc (21) will rupture and the high pressure gas will enter the emergency pressure relief tank (61) through the recovery pipeline (6). Buffer packing and cooling spray device can be installed in the emergency pressure relief tank (61) to realize the pressure reduction and cooling of the gas, prevent direct discharge from causing danger, and avoid the problem of sudden pressure increase in the pressure relief valve (14) during the acylation reaction. S2: Before the rupture disc (21) explodes, it will be subjected to pressure and move upward. Under the action of the stud (22), it will drive the first driving member (32) to rise, so that the first driving member (32) drives one end of the pressure rod (34), causing one end of the pressure rod (34) to tilt upward, and the other end drives the fastening member (35) to move downward, thereby causing the fastening member (35) to fasten (36), thereby improving the sealing performance when the pressure inside the reactor body (1) is at its maximum and avoiding gas leakage; S3: When the rupture disc (21) moves upward, the second driving component (43) will move upward under the action of the stud (22). When the second driving component (43) moves upward, it will drive the driven component (44), so that the power rod (45) drives the lock head (46) to move towards the latch (47), and then the lock head (46) and the latch (47) are engaged together to achieve the explosion-proof effect. When the rupture disc (21) explodes, there will be fragments. These fragments can be collected by the gas mesh plate (4) to prevent the fragments from entering the reactor body (1) and causing pollution to the synthesis of acephate.

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